1. **Preheat the Oven:**
– Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease it with oil.

2. **Prepare the Potatoes:**
– In a large bowl, toss the potato slices with olive oil, salt, black pepper, garlic powder, and paprika until they are evenly coated.

3. **Arrange on Baking Sheet:**
– Arrange the potato slices in a single layer on the prepared baking sheet. Make sure they are not overlapping to ensure even cooking.

4. **Add Rosemary and Garlic (Optional):**
– If using, scatter the fresh rosemary sprigs and crushed garlic cloves over the potato slices for added flavor.

5. **Roast the Potatoes:**
– Roast in the preheated oven for about 25-30 minutes, or until the potatoes are golden brown and crispy on the edges. Flip the slices halfway through the cooking time to ensure even roasting.

6. **Brush with Butter:**
– After roasting, brush the melted butter over the potato slices for added richness and flavor.

7. **Garnish and Serve:**
– Garnish with fresh herbs like parsley or thyme before serving.

Enjoy your delicious roasted potato slices as a side dish or a tasty snack!

Enjoy!